CPC Subgroup
G01M 3/04 by detecting the presence of fluid at the leakage point
Full Title
Investigating fluid-tightness of structures > by using fluid or vacuum > by detecting the presence of fluid at the leakage point
6 direct subcodes
Child Classifications
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- G01M 3/06 by observing bubbles in a liquid pool
- G01M 3/12 by observing elastic covers or coatings, e.g. soapy water
- G01M 3/16 using electric detection means ( G01M3/06, G01M3/12, G01M3/20, G01M3/24, G01M3/26 take precedence)
- G01M 3/20 using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M 3/24 using infrasonic, sonic or ultrasonic vibrations
Top Applicants
Top 10 applicants by patent filingsfor class G01, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 21,460
- ROBERT BOSCH DE 17,801
- SGCC(STATE GRID CORPORATION OF CHINA) 17,347
- SAMSUNG ELECTRONICS COMPANY KR 13,192
- QUALCOMM US 9,900
- HALLIBURTON ENERGY SERVICES GROUP US 9,742
- PHILIPS ELECTRONICS NL 7,249
- MITSUBISHI ELECTRIC CORPORATION JP 6,503
- ZHEJIANG UNIVERSITY 6,414
- DENSO CORPORATION JP 6,382